<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
          body{
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
         .container{
            background-color: rgba(242,242,242);
            max-width: 450px;
            width: 450px;
            overflow: hidden;
        }
        .header {
            background-color: rgb(62, 125, 254);
            text-align: center;
            line-height: 40px;
            color: rgb(255, 255, 255);
            font-size: 18px;
        }
    </style>
</head>
<body>
      <div class="container">
            <div class="header">课程详情</div>
            <div class="basic-info"></div>
            <div class="schedule-info"></div>
            <div class="fee-info"></div>
            <div class="desc-info"></div>
            <div class="agreement"></div>
            <div class="apply-button"></div>

      </div>
</body>
</html>